Method of using a test strip for the immunochemical detection of substances

• US 6,228,658 B1
• Filed: 11/24/1998
• Issued: 05/08/2001
• Est. Priority Date: 07/08/1998
• Status: Expired due to Term

• Current Assignee: Dräger Sicherheitstechnik GmbH (FPS Vermögensverwaltung GmbH)
• Original Assignee: Dräger Sicherheitstechnik GmbH (FPS Vermögensverwaltung GmbH)
• Inventors: Formica, Philip-Michael, Manns, Andreas, Polzius, Rainer
• Primary Examiner(s): ALEXANDER, LYLE
• Application Number:
  US09/199,134
• Time in Patent Office: 896 Days
• Field of Search: 422/56, 422/58, 422/61, 436/815-816, 436/901, 436/164, 436/169
• US Class Current: 436/169
• CPC Class Codes: G01N 33/54366 Apparatus specially adapted for solid-phase testing
• CPC Class Codes: G01N 33/54388 based on lateral flow
• CPC Class Codes: G01N 33/558 using diffusion or migration of antigen or antibody immunochromatographic test strips G01N33/54387
• CPC Class Codes: Y10S 436/816 Alkaloids, amphetamines, and barbiturates
• CPC Class Codes: Y10S 436/901 Drugs of abuse, e.g. narcotics, amphetamine

Abstract

A test strip for the immunochemical detection of substances after sampling from surfaces, with a conjugate zone (2) located between an eluent application zone (1) at one end of the test strip and a reaction zone (3) at the opposite end, the zones being in liquid connection with one another. A section of the test strip in the area including the eluent application zone and the reaction zone is used to wipe off the surface and as a sampling zone (4). The eluent application zone may be used as a sampling zone. The test strip is connected to a preferably flexurally rigid test strip holder (6), which does not cover the sampling zone (4).

Claims

1. A process for detecting substances by means of a test strip, the process comprising the steps of:

providing a test strip with an eluent application zone, a reaction zone, a conjugate zone located between said eluent application zone at one end of the test strip and said reaction zone at the opposite end of the test strip, the zones being in liquid contact with one another, said eluent application zone being integal with the test strip said conjugate zone including deposited, labeled, specific binding partners for an immunochemical detection reaction in said reaction zone, where said reaction can be directly detected visually;

using said eluent application zone as a sampling zone and wiping the surface to be tested for the substance to be detected with said eluent application zone;

applying elution liquid to said eluent application zone so that elution liquid and the substance to be detected migrate in the direction of said reaction zone; and

visually detecting and measuring the presence of the substance in said reaction zone based on said immunochemical detection reaction.

2. The process in accordance with claim 1, wherein said detecting and measuring the presence of the substance detects drugs.

3. The process in accordance with claim 1, wherein said detecting and measuring the presence of the substance detects low-molecular-weight harmful substances.

4. The process in accordance with claim 1, wherein said detecting and measuring the presence of the substance detects proteins and/or allergens.

5. The process in accordance with claim 1, wherein said detecting and measuring the presence of the substance detects substances in body fluids of living beings.

6. The process in accordance with claim 1, wherein

said sample zone is physically connected to said conjugate zone.

7. The process in accordance with claim 1, wherein

said sample zone, said eluent application zone, said reaction zone and said conjugate zone are physically connected to each other.

8. The process in accordance with claim 1, wherein

said labeled, specific binding partners include one of metal colloids, colored latex particles and fluorophores as optical labeling substances.